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MQSeries.net Forum IndexGeneral IBM MQ SupportPublisher/Subscriber with multiple subscribers

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zollen
PostPosted: Mon Jun 25, 2018 4:34 pm Post subject: Publisher/Subscriber with multiple subscribers Reply with quote

Newbie

Joined: 24 Jan 2003
Posts: 4

This is a multiple publishers and multiple subscribers model question.

Is it possible to create a non-broadcast topic where a message could be consumed by one and only one subscriber (amount multiple subscribers)? I am new to MQ so any info would be much grateful.
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bruce2359
PostPosted: Mon Jun 25, 2018 4:51 pm Post subject: Reply with quote

Poobah

Joined: 05 Jan 2008
Posts: 8077
Location: US: west coast, almost. Otherwise, enroute.

Pub/sub publishers use the usual MQOPEN and MQPUT calls to publish. Consumers use the usual MQOPEN and MQGET calls.

An app can MQOPEN the topic specifying INPUT_EXCLUSIVE to ensure there are no other consumers.
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Vitor
PostPosted: Mon Jun 25, 2018 11:48 pm Post subject: Reply with quote

Grand High Poobah

Joined: 11 Nov 2005
Posts: 25049
Location: Ohio, USA

This method doesn't allow one publication to be consumed by only one of a pool of subscriber in a load balancing scenario.

Stick with clustering for that
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markt
PostPosted: Tue Jun 26, 2018 1:14 am Post subject: Reply with quote

Chevalier

Joined: 14 May 2002
Posts: 401

Not very clear what the requirement is, but it sounds like shared subscriptions may be relevant. Multiple subscribers to the same topic on the same system, but only one copy of the publication delivered to the target queue.

https://www.ibm.com/support/knowledgecenter/en/SSFKSJ_9.0.0/com.ibm.mq.dev.doc/q119140_.html
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